Seco 17006988 Corner Radius End Mill 1/4 in 5 Flute Altin

Product Description

The SECO 17006988 is a solid carbide corner radius end mill engineered for high-performance finishing operations in demanding materials. Part of the S545R series, it features a 1/4 inch diameter, a 0.0200 inch corner radius, and five flutes with a 45-degree high helix spiral configuration. The AlTiN PVD coating improves heat resistance and tool life when cutting ferrous and hard materials. Designed for single-end, right-hand cutting with centercutting capability, it installs directly into standard straight-shank toolholders. The 1/4 inch shank and 2 inch overall length suit compact toolpath requirements on CNC machining centers and manual mills.

This end mill is intended for finishing passes in steel, stainless steel, superalloys, titanium, and other hard materials classified under material codes P, M, S, and H. The short flute length of 3/8 inch and high-helix geometry reduce deflection and improve surface finish in tight-tolerance applications. It is used in aerospace, tool-and-die, and precision manufacturing environments where edge integrity and dimensional accuracy are critical. A licensed machinist or CNC tooling technician typically selects and installs this tool.

Key Features

• 5-flute high-helix spiral geometry at 45 degrees for improved chip evacuation and surface finish
• AlTiN PVD coating for extended tool life in high-heat and hard-material cutting applications
• 0.0200 inch corner radius with tolerance of plus 0.00100 to minus 0.00100 inch for consistent edge geometry
• Centercutting design allows plunge entry without a pre-drilled hole
• Solid carbide construction provides rigidity and wear resistance in ferrous and exotic alloy machining
• Normal pitch, right-hand flute direction, no chipbreaker — optimized for finishing, not roughing

Compatibility

Designed for use with standard straight-cylindrical toolholders accepting a 1/4 inch shank. Suitable for CNC machining centers and manual milling machines running steel, stainless steel, superalloys, titanium, and hard materials (material codes P, M, S, H) as specified by the manufacturer.

Installation Notes

Installation is performed by a qualified machinist or CNC tooling technician. Power down or disable the spindle and engage any machine lock-out procedure before changing tooling. Confirm toolholder bore cleanliness and shank seating before tightening to avoid runout exceeding the 0.0005 inch maximum TIR specification. Do not use this end mill for heavy roughing passes; it is rated for finishing material removal only.